Navigation Links
Ancient 'Nutcracker Man' challenges ideas on evolution of human diet
Date:4/30/2008

Ungar points out that the teeth only suggest "what P. boisei could eat, but not necessarily what it did eat."

Anthropologists have traditionally inferred the diet of ancient human ancestors by looking at the size and shape of the teeth and jaws. However, by using powerful microscopes to look at the patterns of wear on a tooth, scientists can get direct evidence of what the species actually ate.

Since food interacts with teeth, it leaves behind telltale signs that can be measured. Hard foods like nuts and seeds, for instance, lead to more complex tooth profiles, while tough foods like leaves lead to more parallel scratches.

Researchers compared dental microwear profiles of P. boisei to modern-day primates that eat different types of foods. P. boisei teeth were compared to those of the Old World Monkey species grey-cheeked mangabeys, and the New World Monkey species brown capuchin monkeys--both of these species consume mostly soft items but fall back on hard nuts or palm fronds.

Old World monkeys are found today in South and East Asia, the Middle East, Africa and Gibraltar at the southern tip of Spain. New World monkeys are found in tropical forest environments in southern Mexico, Central and South America.

P. boisei dental profiles also were compared to the New World mantled howling monkey and Old World silvered leaf monkey, which eat mostly leaves. Researchers also compared them to some of P. boisei's more contemporary counterparts--Australopithecus africanus, which lived between 3.3 million and 2.3 million years ago, and Paranthropus robustus, which lived between 2 million and 1.5 million years ago.

The findings showed that P. boisei teeth had light wear, suggesting that none of the individuals ate extremely hard or tough foods in the days leading up to death. The pattern was more consistent with modern-day fruit-eating animals than with most modern-day primates.

"It looks more like they were eating Je
'/>"/>

Contact: Bobbie Mixon
bmixon@nsf.gov
703-292-8485
National Science Foundation
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Ancient sunflower fuels debate about agriculture in the Americas
2. Ancient ecosystems organized much like our own
3. Synchrotron light unveils oil in ancient Buddhist paintings from Bamiyan
4. Ancient DNA: reconstruction of the biological history of Aldaieta necropolis
5. Ancient reptile rises from Alberta oil sands
6. Ancient lemurs little finger poses mystery
7. Floating a big idea: MIT demos ancient use of rafts to transport goods
8. Ancient mystery solved
9. New dinosaur from Mexico offers insights into ancient life on West America
10. Scientists rebuild ancient proteins to reveal primordial Earths temperature
11. Avian origins: new analysis confirms ancient beginnings
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Ancient 'Nutcracker Man' challenges ideas on evolution of human diet
(Date:9/2/2014)... lithographic limestone is well known as a result ... area (for example, Archaeopteryx). Now, for the first ... French equivalent of these outcrops - discoveries which ... water treader. , Despite the abundance of fossils ... been obtained from the Late Kimmeridgian equivalents of ...
(Date:9/2/2014)... stride; others are done in by it. New research ... this so-called stress gap in mice with very similar ... to better understand the development of psychiatric disorders such ... has unique experiences as it goes through its life. ... the expression of genes, and as a result, affect ...
(Date:9/1/2014)... U.S. has improved steadily in recent yearsspurred in large ... remains poor and disparities continue to widen among socioeconomic ... Harvard School of Public Health (HSPH). , "The study ... extensive efforts by many groups and individuals to improve ... also indicates that these efforts need to be expanded," ...
Breaking Biology News(10 mins):Exceptionally well preserved insect fossils from the Rhône Valley 2Discovery hints at why stress is more devastating for some 2Discovery hints at why stress is more devastating for some 3Quality of US diet shows modest improvement, but overall remains poor 2Quality of US diet shows modest improvement, but overall remains poor 3
... has identified a lung protein that appears to play ... an antibody to block its activity, Indiana University scientists ... the protein, a cytokine named EMAPII, could provide a ... M.D., associate professor of medicine at the Indiana University ...
... take to regenerate a limb? Biologists have long thought that ... cells that can generate any tissue in the body. But ... regrow the complete organ, at least in zebrafish. Researchers ... shown that cells capable of regenerating a zebrafish fin do ...
... has worked with wireless sensor network developers Senceive, ... across critical structures in the UK that will ... Senceive,s main application area is long-term infrastructure monitoring. ... used to assess the condition of railway structures, ...
Cached Biology News:Protein could offer target to reduce lung damage from smoking-caused emphysema 2Zebrafish regrow fins using multiple cell types, not identical stem cells 2NPL helps Senceive to offer improved monitoring of structural assets across the UK 2
(Date:9/2/2014)... , Sept. 2, 2014  TransCelerate BioPharma ... a recommended approach for protecting personal data in ... researchers, patients and others. The document describes an ... information from CSRs and other related clinical trial ... The goal of the TransCelerate CSR Redaction ...
(Date:9/2/2014)... September 02, 2014 Myriant Corporation, ... signage of a distribution agreement with Azelis Group, ... distributing Myriant’s bio-succinic acid in the Nordics, Benelux, ... targeting customers in the industrial and base chemicals ... Azelis offers a far-reaching chemical portfolio with extensive ...
(Date:9/2/2014)... -- Orexigen Therapeutics, Inc. (Nasdaq: OREX ) ... (PTO) has issued a patent related to NB32, the ... is a fixed-dose combination of naltrexone sustained release (SR) ... claims methods for treating insulin resistance using a composition ... If NB32 is approved for use in ...
(Date:9/2/2014)... Inc. (Nasdaq: ONTY ) announced today that ... present at the Rodman & Renshaw 16 th Annual ... on Tuesday, Sept. 9, 2014 at 2:05 p.m. Eastern. ... will be accessible by visiting the Oncothyreon website www.oncothyreon.com ... About Oncothyreon Oncothyreon is a biotechnology company ...
Breaking Biology Technology:TransCelerate BioPharma Inc. Releases Recommended Approach for Protecting Personal Data in Clinical Study Reports 2TransCelerate BioPharma Inc. Releases Recommended Approach for Protecting Personal Data in Clinical Study Reports 3Myriant and Azelis Sign European Distribution Agreement for Bio-Succinic Acid 2Orexigen Expands NB32 Intellectual Property Portfolio With New U.S. Patent 2Orexigen Expands NB32 Intellectual Property Portfolio With New U.S. Patent 3Orexigen Expands NB32 Intellectual Property Portfolio With New U.S. Patent 4
... presented today show that RAPAFLO(R) (silodosin) significantly reduced ... pain syndrome (CP/CPPS).  In the study presented at ... RAPAFLO(R) also significantly improved urinary symptoms as well ... pelvic pain syndrome (CP/CPPS) is a common condition ...
... 2011 Brian Olson didn,t exactly fit the image of an ... first to admit it. "I had just a GED and was ... math." With a vague notion that he wanted to ... enrolled in basic chemistry and biology courses as a freshman. ...
... May 17, 2011 P f enex ... has submitted a Biologics Master File (BMF) to the United ... carrier protein to support the development of conjugate vaccine products ... supplying cGMP grade CRM197 carrier protein to multiple partners in ...
Cached Biology Technology:Watson Pharmaceuticals Announces New Research Showing RAPAFLO(R) (silodosin) Improves Outcomes for Chronic Prostatitis/Chronic Pelvic Pain Syndrome 2Watson Pharmaceuticals Announces New Research Showing RAPAFLO(R) (silodosin) Improves Outcomes for Chronic Prostatitis/Chronic Pelvic Pain Syndrome 3Watson Pharmaceuticals Announces New Research Showing RAPAFLO(R) (silodosin) Improves Outcomes for Chronic Prostatitis/Chronic Pelvic Pain Syndrome 4Watson Pharmaceuticals Announces New Research Showing RAPAFLO(R) (silodosin) Improves Outcomes for Chronic Prostatitis/Chronic Pelvic Pain Syndrome 5Watson Pharmaceuticals Announces New Research Showing RAPAFLO(R) (silodosin) Improves Outcomes for Chronic Prostatitis/Chronic Pelvic Pain Syndrome 6From GED to PhD: Borough of Manhattan Community College's Brian Olson Faces Academic Deficits Only to Be Rewarded with Acceptance to CUNY's PhD Program in Biochemistry 2Pfenex Inc., Through Its Reagent Proteins Business Division, Announces Submission of Biologics Master File for Recombinant CRM197 to US FDA 2Pfenex Inc., Through Its Reagent Proteins Business Division, Announces Submission of Biologics Master File for Recombinant CRM197 to US FDA 3
...
...
...
D.R. Harper and C. Grose (1994) • Includes: virus structure & replication, fundamental virology, immunology and pathogenesis, vaccines and antiviral drugs, novel diagnostic techniques, cloning a...
Biology Products: